Question
A thin converging lens is used to produce a sharp image of a candle.
Various sharp images are produced on the screen by moving the lens and the screen backwards and forwards.
Which statement is always correct?
The image is at the principal focus (focal point) of the lens.
The image is bigger than the object.
The image is closer to the lens than the object.
The image is inverted.
Answer/Explanation
Ans: D
Question
An object is placed in front of a thin converging lens.
The diagram shows the paths of two rays from the top of the object.
An image of the object is formed on a screen to the right of the lens. How does this image compare with the object?
It is larger and inverted.
It is larger and the same way up.
It is smaller and inverted.
It is smaller and the same way up.
Answer/Explanation
Ans: A
Question
Which diagram correctly represents rays of light passing through a converging lens in a camera?
Answer/Explanation
Ans: A
Question
The points labelled F are the principal foci of a lens. A beam of parallel light is incident on the lens.
Which diagram shows the path of the light after it passes through the lens?
Answer/Explanation
Ans: B